The Android operating system, currently installed on billions of devices across the globe, is receiving some significant security enhancements.

This new Google Android update stops smartphone users from doing three things — here’s what they are and why it matters.

Several years ago, Android introduced Factory Reset Protection, a security feature that prevents an unauthorized person from accessing your phone by requiring a Google login or PIN after a factory reset. If someone fails these logins, they can't complete setup (meaning they then can't sell your phone).